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Finding the Fourth Proportional to 17,619.64, 26,378.20 and 13,712.20

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Solution

The fourth proportional to 17,619.64, 26,378.20 and 13,712.20 is: 20,528.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,619.64 : 26,378.20 = 13,712.20 : x
  2. Step 2: Convert to fraction form
    17,619.64/26,378.20 = 13,712.20/x
  3. Step 3: Cross multiply
    17,619.64x = 26,378.20 × 13,712.20
  4. Step 4: Simplify right side
    17,619.64x = 361,703,154.04
  5. Step 5: Solve for x
    x = 361,703,154.04/17,619.64
  6. Step 6: Final answer
    x = 20,528.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.